Grevillea plant named ‘Kings Rainbow’

ABSTRACT

A new and distinct cultivar of  Grevillea  plant named ‘Kings Rainbow’, characterized by its light yellow-green and medium red bi-colored, medium green-colored foliage, and moderately vigorous, semi-upright growth habit, is disclosed.

Latin name of genus and species of plant claimed: Grevillea hybrid.

Variety denomination: ‘Kings Rainbow’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct cultivar of Grevillea plant botanically known as Grevillea hybrid and hereinafter referred to by the cultivar name ‘Kings Rainbow’.

The new cultivar originated in a controlled breeding program in West Perth, Australia during May 2010. The objective of the breeding program was the development of Grevillea cultivars that have large inflorescences with attractive colors.

The new Grevillea cultivar is the result of cross-pollination. The female (seed) parent of the new cultivar is a Grevillea armigera proprietary breeding selection not coded, not patented, characterized by its yellow-green and dark burgundy to black colored inflorescences, medium green-colored foliage, and moderately vigorous, semi-upright growth habit. The male (pollen) parent of the new cultivar is a Grevillea hybrid proprietary breeding selection coded 20101122, not patented, characterized by its medium red-colored inflorescences, medium green-colored foliage, and vigorous, upright growth habit. The new cultivar was discovered and selected as a single flowering plant within the progeny of the above stated cross-pollination during September 2011 in a controlled environment in in West Perth, Australia.

Asexual reproduction of the new cultivar by terminal stem cuttings since September 2011 in West Perth Australia and Valley Center, Calif. has demonstrated that the new cultivar reproduces true to type with all of the characteristics, as herein described, firmly fixed and retained through successive generations of such asexual propagation.

SUMMARY OF THE INVENTION

The following characteristics of the new cultivar have been repeatedly observed and can be used to distinguish ‘Kings Rainbow’ as a new and distinct cultivar of Grevillea plant:

-   -   1. Light yellow-green and medium red bi-colored inflorescences;     -   2. Medium green-colored foliage; and     -   3. Moderately vigorous, semi-upright growth habit.

Plants of the new cultivar differ from plants of the female parent primarily in inflorescence color and from plants of the male parent primarily in inflorescence color and growth habit.

Of the many commercially available Grevillea cultivars, the most similar in comparison to the new cultivar is ‘Red Hooks’, not patented. However, in side-by-side comparison, plants of the new cultivar differ from plants of ‘Red Hooks’ in at least the following characteristics:

-   -   1. Plants of the new cultivar have a leaf shape different from         plants of ‘Red Hooks’;     -   2. Plants of the new cultivar have a bud color different from         plants of ‘Red Hooks’; and     -   3. Plants of the new cultivar have an inflorescence color that         is a shade of red different from plants of ‘Red Hooks’.

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

The accompanying photographs show, as nearly true as it is reasonably possible to make the same in color illustrations of this type, typical flower and foliage characteristics of the new cultivar. Colors in the photographs may differ slightly from the color values cited in the detailed description, which accurately describes the colors of ‘Kings Rainbow’. The plants are approximately two-years old and were grown in three-gallon containers for approximately 17 months in an outdoor nursery in Valley Center, Calif. Plants were given two pinches during the 17 month growth period.

FIG. 1 illustrates a side view of the overall growth and flowering habit of ‘Kings Rainbow’.

FIG. 2 illustrates a close-up view of the inflorescences of ‘Kings Rainbow’.

DETAILED BOTANICAL DESCRIPTION

The new cultivar has not been observed under all possible environmental conditions to date. Accordingly, it is possible that the phenotype may vary somewhat with variations in the environment, such as temperature, light intensity, and day length, without, however, any variance in genotype.

The chart used in the identification of colors described herein is The R.H.S. Colour Chart of The Royal Horticultural Society, London, England, 2007 edition, except where general color terms of ordinary significance are used. The color values were determined in January 2016 under natural light conditions in West Chicago, Ill.

The following descriptions and measurements describe two-year old plants produced from cuttings from stock plants and grown in an outdoor nursery in Valley Center, Calif. Temperatures for this period ranged from 72° F. to 78° F. (22° C. to 26° C.) during the day to 52° F. to 58° F. (11° C. to 14° C.) during the night. The plants were grown in three-gallon containers for approximately 17 months utilizing a soilless growth medium. Plants were given two pinches during the 17 month growth period. Measurements and numerical values represent averages of typical plants.

-   Botanical classification: Grevillea hybrid cultivar Kings Rainbow. -   Parentage:     -   -   Female parent.—Grevillea armigera proprietary breeding             selection not coded, not patented.         -   Male parent.—Grevillea hybrid proprietary breeding selection             coded 20101122, not patented. -   Propagation:     -   -   Type cutting.—Terminal stem.         -   Time to initiate roots.—Approximately 12 to 16 weeks.         -   Time to produce a rooted cutting.—Approximately 20 to 24             weeks.         -   Root description.—Light brown in color, fine.         -   Rooting habit.—Freely branching, tight groupings of small             rootlets. -   Plant description:     -   -   Commercial crop time.—Approximately 16 to 24 weeks from a             rooted cutting to finish in a one-gallon container.         -   Growth habit and general appearance.—Moderately vigorous,             upright.         -   Size.—Height from soil level to top of plant plane:             Approximately 30.0 cm. Width: Approximately 46.0 cm.         -   Branching habit.—Freely branching, pinching enhances             branching. Quantity of main branches per plant:             Approximately 1 trunk with 6 branches.         -   Branch.—Strength: Strong. Length to base of peduncle:             Approximately 18.0 cm. Diameter: Approximately 4.0 mm.             Length of central internode: Approximately 2.0 cm. Texture:             Tomentose. Pubescence color: NN155D with 199B. Color of             young stems: 146B, color appears light brown due to             pubescence. Color of mature stems: 199A with N200B. -   Foliage description:     -   -   General description.—Form: Simple. Arrangement: Alternate.             Fragrance: None detected.         -   Leaves.—Aspect: Acute angle to stem. Shape: 6 to 8 lobed,             lobes linear and clustered nearest apex. Margin: Entire,             pinnatisect; leaf margins curve downwards enclosing the             lower surface of the leaf. Apex of lobes: Acute. Base:             Narrowly attenuate. Venation pattern: Pinnate. Length of             mature leaf: Approximately 8.0 cm. Width of mature leaf:             Approximately 6.5 cm. Texture of upper surface: Immature             leaves moderately pubescent, scattered silky hairs, becomes             sparsely pubescent with development. Texture of lower             surface: Tomentose with the exception of midvein. Pubescence             color: NN155D. Color of upper surface of young foliage: 137B             mixed with 144A, color appears slightly lighter due to             pubescence, indistinguishable venation. Color of lower             surface of young foliage: Closest to 137C mixed with 144A,             color appears slightly lighter due to pubescence,             indistinguishable venation. Color of upper surface of mature             foliage: 137A, lobe tips tinted with 187A, venation             indistinguishable. Color of lower surface of mature foliage:             138A, color appears slightly lighter due to pubescence,             indistinguishable venation. -   Flowering description:     -   -   Flowering habit.—‘Kings Rainbow’ is freely flowering under             outdoor growing conditions with substantially continuous             blooming in Zones 9a through 11.         -   Lastingness of individual inflorescence on the             plant.—Approximately 3 weeks. -   Inflorescence description:

General description.—Type: Raceme. Self-cleaning. Shape: Cylindrical conflorescence. Aspect: Facing upward and outward. Arrangement: Terminal and from leaf axils. Fragrance: None detected. Quantity per plant: Approximately 5. Diameter: Approximately 7.0 cm. Depth: Approximately 6.5 cm.

-   -   -   Bud.—Rate of opening: Generally takes 4 to 6 days for bud to             progress from first color to fully open floret.         -   Bud just before opening.—Shape: Globular. Diameter:             Approximately 3.0 mm. Texture of outer surface: Tomentose.             Pubescence color: NN155D. Color: 154C appears lighter due to             pubescence.         -   Florets.—Quantity per inflorescence: Approximately 80.             Arrangement: Primarily in pairs. Length: Approximately             3.2 cm. Diameter: Approximately 7.0 mm.         -   Perianth.—Shape: Tubular with a ventral limb, becomes             revolute during anthesis. Length: Approximately 9.0 mm.             Diameter at widest point: Approximately 7.0 mm. Diameter at             base: Approximately 2.0 mm.         -   Tepals.—Quantity: 4. Shape: Linear. Margin: Entire. Apex:             Acute. Length: Approximately 9.0 mm. Width: Approximately             2.0 mm. Texture of outer surface: Tomentose. Pubescence             color: NN155D. Texture of inner surface: Glabrous. Color of             outer surface when fully open: 145C, appears to be a lighter             color due to pubescence. Color of inner surface when fully             open: Closest to 154D.         -   Peduncle.—Strength: Strong. Aspect: Erect. Length:             Approximately 1.5 cm. Diameter: Approximately 3.0 mm.             Texture: Tomentose. Pubescence color: NN155D with 199B.             Color: 146B, color appears light brown due to pubescence.         -   Rachis.—Strength: Strong. Length: Approximately 6.0 cm.             Diameter: Approximately 3.0 mm. Texture of outer surface:             Tomentose. Pubescence color: NN155D. Color: 146B appears             lighter due to pubescence.         -   Pedicel.—Strength: Strong. Aspect: Erect. Length:             Approximately 4.0 mm. Diameter: Approximately 1.0 mm.             Texture of outer surface: Tomentose. Pubescence color:             NN155D. Color: 145C appears lighter due to pubescence.         -   Reproductive organs.—Androecium: Anthers located within             perianth limb and basally attached to perianth. Anther             quantity: 4 per floret. Anther shape: Bilobed. Anther             length: Approximately 1.0 mm. Anther color: 187A with             surface facing tepals of 146B. Pollen amount: Sparse. Pollen             color: 163D. Gynoecium: Stigma functions as a pollen             presenter holding pollen for pollinators to remove until             stigma matures becoming receptive to cross pollination.             Nectary located at base of ovary. Pistil quantity: 1 per             floret. Pistil length: Approximately 3.2 cm. Stigma shape:             Funnel. Stigma length: Less than 1 mm. Stigma color: 163A.             Style length: Approximately 3.0 cm. Style color: 145B at             base transitioning to 53A at stigma. Ovary length:             Approximately 2.0 mm. Ovary texture: Tomentose. Pubescence             color: NN155D. Ovary color: 145D, appears white due to             pubescence. Nectary size: Approximately 1.0 mm in length and             2.0 mm in width. Nectary color: 145A.

-   Seed and fruit production: Neither seed nor fruit production has     been observed.

-   Disease and pest resistance: Resistance to pathogens and pests     common to Grevillea has not been observed. 

What is claimed is:
 1. A new and distinct cultivar of Grevillea plant named ‘Kings Rainbow’, substantially as herein illustrated and described. 